Microsoft Defender Antivirus detects and removes this threat.

This ransomware can stop you from using your PC or accessing your data. It might ask you to pay money to a malicious hacker.

It may be installed by malicious documents with embedded macro, such as Trojan:O97M/Goldeneye.A.

Note: On June 27, 2017, a new variant of Ransom:Win32/Petya was observed spreading in several countries. The new variant added a worm-like capability that allows it to spread across affected networks. Read about the Petya outbreak here:

• Windows 10 platform resilience against the Petya ransomware attack
• New ransomware, old techniques: Petya adds worm capabilities

Our ransomware FAQ page has more information on this type of threat.

The trend towards increasingly sophisticated malware behavior, highlighted by the use of exploits and other attack vectors, makes older platforms so much more susceptible to ransomware attacks. From June to November 2017, Windows 7 devices were 3.4 times more likely to encounter ransomware compared to Windows 10 devices.

Read our latest report: A worthy upgrade: Next-gen security on Windows 10 proves resilient against ransomware outbreaks in 2017.

Microsoft Defender Antivirus detects and removes this threat.

This ransomware can stop you from using your PC or accessing your data. It might ask you to pay money to a malicious hacker.

It may be installed by malicious documents with embedded macro, such as Trojan:O97M/Goldeneye.A.

Note: On June 27, 2017, a new variant of Ransom:Win32/Petya was observed spreading in several countries. The new variant added a worm-like capability that allows it to spread across affected networks. Read about the Petya outbreak here:

• Windows 10 platform resilience against the Petya ransomware attack
• New ransomware, old techniques: Petya adds worm capabilities

Our ransomware FAQ page has more information on this type of threat.

The trend towards increasingly sophisticated malware behavior, highlighted by the use of exploits and other attack vectors, makes older platforms so much more susceptible to ransomware attacks. From June to November 2017, Windows 7 devices were 3.4 times more likely to encounter ransomware compared to Windows 10 devices.

Read our latest report: A worthy upgrade: Next-gen security on Windows 10 proves resilient against ransomware outbreaks in 2017.

Microsoft Defender Antivirus detects and removes this threat.

This is a detection for malicious macro contained in documents. These documents may be distributed via spam.

The malicious macro may drop and execute malicious executables, including Trojan:Win32/Petya.G.